scholarly journals Υ Radiative Decays to Light Quark Jets and Color Octet Mechanism

2006 ◽  
Vol 46 (6) ◽  
pp. 1017-1022 ◽  
Author(s):  
Gao Ying-Jia ◽  
Zhang Yu-Jie ◽  
Chao Kuang-Ta
Keyword(s):  
Light Quark ◽  
Radiative Decays ◽  
Color Octet ◽  
Color Octet Mechanism ◽  
Quark Jets

scholarly journals Production of π±, K±, p and $\bar p$ in Quark, Antiquark and Gluon Jets

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 226-228 ◽  
Author(s):  
◽  
Hyejoo Kang
Keyword(s):  
Particle Production ◽  
Light Quark ◽  
Hadron Production ◽  
Charged Hadron ◽  
Momentum Range ◽  
Imaging Detector ◽  
Gluon Jets ◽  
Quark Jets ◽  
Cherenkov Ring ◽  
Ring Imaging

We present measurements of identified charged hadron production over a wide momentum range using the SLD Cherenkov Ring Imaging Detector. In addition to studying flavor-inclusive Z0 decays, we compare particle production in decays into light, c and b flavors and compare production in gluon jets with that in light quark jets, where the jet flavors are selected using precision vertex information.

scholarly journals Quarkonium Production at Z0 and in ϒ(1S) Decay

1997 ◽  
Vol 12 (22) ◽  
pp. 3931-3940
Author(s):  
Kingman Cheung ◽  
Wai-Yee Keung ◽  
Tzu Chiang Yuan
Keyword(s):  
Color Singlet ◽  
Fixed Target ◽  
Production Rates ◽  
Fixed Target Experiments ◽  
Color Octet ◽  
Quarkonium Production ◽  
Color Octet Mechanism

The conventional color-singlet model was challenged by the recent data on quarkonium production. Discrepancies in production rates were observed at the Tevatron, at LEP, and in fixed-target experiments. The newly advocated color-octet mechanism provides a plausible solution to the anomalous quarkonium production observed at the Tevatron. The color-octet mechanism should also affect other quarkonium production channels. In this paper we will summarize the studies of quarkonium production in Z0 and ϒ decays.

scholarly journals Color-octet mechanism andJ/ψpolarization at CERN LEP

1997 ◽  
Vol 55 (11) ◽  
pp. 6839-6843 ◽  
Author(s):  
Seungwon Baek ◽  
P. Ko ◽  
Jungil Lee ◽  
H. S. Song
Keyword(s):  
Color Octet ◽  
Color Octet Mechanism

scholarly journals POWER SCALING RULES FOR CHARMONIA PRODUCTION AND HQEFT

2001 ◽  
Vol 16 (25) ◽  
pp. 4189-4206 ◽  
Author(s):  
MIGUEL-ANGEL SANCHIS-LOZANO
Keyword(s):  
Heavy Quark ◽  
Effective Field ◽  
Tree Level ◽  
Power Scaling ◽  
Color Octet ◽  
Heavy Quark Mass ◽  
Effective Lagrangian ◽  
Pair Annihilation ◽  
Color Octet Mechanism ◽  
Local Operators

We discuss the power scaling rules along the lines of a complete heavy quark effective field theory (HQEFT) for the description of heavy quarkonium production through a color-octet mechanism. To this end, we firstly derive a tree-level heavy quark effective Lagrangian keeping both particle–antiparticle mixed sectors allowing for heavy quark–antiquark pair annihilation and creation, but describing only low-energy modes around the heavy quark mass. Then we show the consistency of using HQEFT fields in constructing four-fermion local operators à la NRQCD, to be identified with standard color-octet matrix elements. We analyze some numerical values extracted from charmonia production by different authors and their hierarchy in the light of HQEFT.

scholarly journals Light Hadron Spectroscopy at BESIII

2018 ◽  
Vol 46 ◽  
pp. 1860022
Author(s):  
Xingtao Huang
Keyword(s):  
Line Shape ◽  
Light Quark ◽  
Radiative Decays ◽  
Data Sets ◽  
Hadron Spectroscopy ◽  
Quark Sector ◽  
Light Hadron ◽  
Gluonic Excitations

BESIII has collected [Formula: see text] and [Formula: see text] of [Formula: see text], which are the world’s largest data samples of [Formula: see text] and [Formula: see text] from [Formula: see text] collision. Radiative decays of charmonium provide a gluon-rich environment and are therefore regarded as one of the most promising hunting grounds for gluonic excitations. Significant progresses in the light-quark sector have been made with the unprecedented high statistics data sets. Several recent results on light hadron spectroscopy and light hadron decays will be reported, including: 1, the observation of the anomalous line shape of [Formula: see text] near [Formula: see text] mass threshold and related studies; 2, studies of glueballs in [Formula: see text] radiative decays; 3, search for [Formula: see text] exotic in [Formula: see text].

scholarly journals Color-octet mechanism in the inclusive D-wave charmonium productions in B decays

1997 ◽  
Vol 395 (1-2) ◽  
pp. 107-112 ◽  
Author(s):  
Pyungwon Ko ◽  
Jungil Lee ◽  
H.S. Song
Keyword(s):  
B Decays ◽  
Color Octet ◽  
Color Octet Mechanism ◽  
D Wave
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